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Development and Implementation of a Performance-Related Specification for I-65 Tennessee: Final Report

TABLE OF CONTENTS

• Technical Report Documentation Page
• Executive Summary
• Chapter 1—Introduction
• Chapter 2—Overview of the Tennessee I-65 Project
• Chapter 3—Development of the Performance-Related Specification
  • Selection of Acceptance Quality Characteristics
  • TDOT Concrete Pavement Specifications
  • Establishment of As-Designed Target Values
  • TDOT Pavement Performance Indicators
  • Inputs Used for PaveSpec 3.0
  • Definitions of Lots and Sublots
  • Development of Pay Factor Curves Using PaveSpec 3.0
  • Computation of AQC Mean and Standard Deviation
• Chapter 4—Implementation of the Performance-Related Specification
  • Layout of Lots and Sublots
  • Pay Adjustment Computation Equations
  • Testing and Calculations of Pay Factors
• Chapter 5—Evaluation of the Performance-Related Specification
  • Quantitative Assessment
  • Comparison with Existing TDOT Pay Factor Curves
  • Impact of Quality on Pavement Life
  • Qualitative Assessment
• Chapter 6—Summary and Recommendations
  • Summary
  • Recommendations
  • Benefits of Performance-Related Specification

References

Appendix A—Final Performance-Related Specification

Appendix B—Summary of All Data in Computational Spreadsheet Format

Appendix C—Expected Pay Information

LIST OF FIGURES

• Figure ES-1. Basic concepts of life-cycle-cost-based performance-related specification pay adjustment for a lot.
• Figure ES-2. Performance-related smoothness specification results for 14 lots.
• Figure ES-3. Summary of performance-related specification pay factor results.

• Figure 1. Basis for pay adjustment in performance-related specification.
• Figure 2. Pay adjustment curve for 28-day compressive strength of concrete.
• Figure 3. Slab thickness pay adjustment curve.
• Figure 4. Initial profile index pay adjustment curve.
• Figure 5. General view of concrete pavement construction on northbound I-65.
• Figure 6. General view of concrete pavement construction on northbound I-65.
• Figure 7. Pay adjustment computation equations.
• Figure 8. Spreadsheet used for calculating pay factors for thickness, strength, and smoothness for each sublot; overall lot pay factor; and contractor pay.
• Figure 9. Comparison of Performance-Related Specification and Tennessee Department of Transportation (TDOT) strength specifications.
• Figure 10. Comparison of Performance-Related Specification and Tennessee Department of Transportation (TDOT) thickness specifications.
• Figure 11. Comparison of Performance-Related Specification and Tennessee Department of Transportation (TDOT) smoothness specifications.
• Figure 12. Comparison of Performance-Related Specification strength specifications and results.
• Figure 13. Comparison of Performance-Related Specification thickness specifications and results.
• Figure 14. Comparison of PRS smoothness specifications and results.
• Figure 15. Summary of performance-related specification pay factor results.
• Figure A-1. Basic concepts of LCC-based PRS pay adjustment for a lot.
• Figure A-2. 28-day compressive strength of concrete pay adjustment curve.
• Figure A-3. Slab thickness pay adjustment curve.
• Figure A-4. Initial PI pay adjustment curve.
• Figure C-1. Expected pay chart for compressive strength (standard deviation = 500 lbf/in²).
• Figure C-2. Expected pay chart for compressive strength (standard deviation = 1,000 lbf/in²).
• Figure C-3. Expected pay chart for slab thickness (standard deviation = 0.5 in.).
• Figure C-4. Expected pay chart for profile index (standard deviation = 1.0 in.).

LIST OF TABLES

• Table 1. Summary of Data From Three Previous Portland Cement Concrete Projects.
• Table 2. Lot Acceptance Quality Characteristic Target Lot Mean and Standard Deviation Selected for I-65 Project.
• Table 3. Design Feature Inputs Used in PaveSpec 3.0.
• Table 4. Traffic Inputs Used in PaveSpec.
• Table 5. Climatic Inputs Used in PaveSpec 3.0.
• Table 6. Global Rehabilitation Activities If 20 Percent of Sublots Are Failed.
• Table 7. Design Feature Inputs Used in PaveSpec 3.0.
• Table 8. Testing Procedures Used for Performance-Related Specification Evaluation.
• Table 9. Compressive strength pay adjustment table (PF, %).
• Table 10. Slab Thickness Pay Adjustment Table (% Pay Factor).
• Table 11. Initial Profile Index Pay Adjustment Table (PF, %).
• Table 12. Correction Factors Used to Obtain Unbiased Estimates of the Actual Standard Deviation.
• Table 13. Quality Requirement for the Performance-Related Specification (PRS) and Tennessee Department of Transportation (TDOT) Standard Method Specifications.
• Table 14. PRS Lot Quality and Pay Factors (PF) for the Northbound Lanes.
• Table 15. Performance-Related Specification Lot Quality and Pay Factors (PF) for the Southbound Lanes.
• Table 16. Target and As-built Acceptance Quality Character Values.
• Table 17. General Survey Responses.
• Table A-1. Lot AQC target lot mean and standard deviation.
• Table A-2. Mean AQC rejectable quality levels for lots.
• Table A-3. Lot AQC maximum quality levels.
• Table A-4. Testing methods.
• Table A-5. Correction factors used to obtain unbiased estimates of the actual standard deviation.
• Table A-6. Compressive strength pay adjustment table.
• Table A-7. Slab thickness pay adjustment table (PF, %).
• Table A-8. Initial PI pay adjustment table (PF, %).
• Table B-1. Northbound Lot 1 PRS Computation Results.
• Table B-2. Northbound Lot 2 PRS Computation Results.
• Table B-3. Northbound Lot 3 PRS Computation Results.
• Table B-4. Northbound Lot 4 PRS Computation Results.
• Table B-5. Northbound Lot 5 PRS Computation Results.
• Table B-6. Northbound Lot 6 PRS Computation Results.
• Table B-7. Southbound Lot 7 PRS Computation Results.
• Table B-8. Southbound Lot 8 PRS Computation Results.
• Table B-9. Southbound Lot 9 PRS Computation Results.
• Table B-10. Southbound Lot 10 PRS Computation Results.
• Table B-11. Southbound Lot 11 PRS Computation Results.
• Table B-12. Southbound Lot 12 PRS Computation Results.
• Table B-13. Southbound Lot 13 PRS Computation Results.
• Table B-14. Southbound Lot 14 PRS Computation Results.

More Information

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Contact

Sam Tyson
Office of Asset Management, Pavement, and Construction
202-366-1326
E-mail Sam